Mixing-machine.



Patented May 11 0 u w o u of dry-colors, I mixture of powdered substances without A UNITED STATES PATENT OFFICE.

Riemann TIEDTKE, or HocHsnoiv-rHE-Mun, GERMANY, nssreivoaro mnnwnnxn & BRUNING, or nocns'r-on-rrnn-mm, GERM NY, A con.-

V'QRM. MEISTER LUCIUS -=PORATIO1 I OF GERMANY. I

mixiive-mncnmn.

l l Specification of Letters Patent.

Patented May 11, 1915. this'appl ication filed October 27.

1910. Serial No. 589,440.

To all whom it may concern:

Be it known that I, RICHARD TIEDTKE, en gineer, citizen of the Empire of Germany, residing at Hochst-on-the-Main, Germany, have invented certain new and useful Improvements in Mixing-Machines, of which the following is a specification.

Thisinvention relates to improvements in mixing machines and has for an object 'to provide a mixer capable of intimately mixing thecomponent parts of the mass under treatment by causing a diversity ofmovements of various portions of the mass.

This application is a division of my ap plication for patent Serial No. 424,015 filed in the United States Patent Office March 30th, 1908, for mixing'machines.

This present improvement is adapted for use in mixing materials of various kinds where an intimate admixture of the component parts of the mass is particularly adapted for use in the mixing and in effecting an intimate causing dust; i e

The container, preferably a drum, will be rotated for effecting the mixture of the mass within it and after the mixing has been accomplished the contents will be discharged without changing the direction of rotation of the container.

The invention also relates to a feeding device, which will feed material either from a supply hopper into the drum, or from the drum to a discharge spout during the rotation of the drum.

In the drawings accompanying and forming a part of this specification a practicable form of my invention is illustrated and wherein- Figure 1 is a longitudinal section of the device and Fig. 2 is a cross-section thereof, taken on a plane at about the line 2-2 of Fig. 1 looking from the right in said figure.

The container is illustrated as a cylindrical drum 3 which is provided with ends or heads 4, 5, respectively. The drum is shown provided with trackers in the form of bands 66" which will run upon wheels 7-7, one or more of which wheels Wlll be rotated in some convenient manner for 1mparting rotation to the drum. The head 4,

of the drum is provided with a, central essential, and is per 12 into the drum,

and discharging device, the-portion 8 thereof, whlch s outside of the drum being preferably-cylindrical, and the portion which 'within the drum being shown in the form of an open, ended hopper 9. A. shaft 10 mounted in suitable bearings traverses the feeding and discharging shaft 10 is provided with device comprised by the body portion 8, and hopper 9; YThea worm, l1, operatmg within the body portion and the hopper.

The body portion8 is provided at its upper portion w th a feed hopper 12, and at its lower portion with a discharge spout 13., A,

pulley 14, is shown mounted upon. the shaft 10 whereby the shaft means 'of a suitable belt which may be driven in reverse directions for feeding or discharging as occasion may demand. It will be noted that if the shaft is rotated in one direction the screw will cause material supplied to the hopper 12 to pass out of the inner or open end ofthe hopper 9, depositing this at a considerable distance in wardly of the head 4 which is at the receiving. and discharging end of the drum, and" that if the shaft is rotated in direction material which is deposited in the hopper 9 will be moved to such a position that it will readily discharge from the spout 18. i p The inner surface of the drum is provided with a series of helical channels 15, such channels 'in the present illustration bein the spaces between a series of helical blades which are designated by reference character 1. Four of these blades are shown. in the present instance each of which extends from end to end of the drum and makes a con1- plete convolution.

the opposite chutes are disposed upon the end 4.- of the drumand are directed inwardly and in such material carried forward to the end 4b} the channels 15, will by such chutes be deposited in the hopper 9, and if the screw 11,

may be rotated Each. of the channels .15 ends in a discharging chute 17, which in the hopper is moving in a direction from left to right in Fig. 2, namely the direction Y which will feed materialsv supplied at hopsuch materials will be returned to the mass of materialwithin the drum-for further treatment. If however,

ion

the feed screw 11 is'revolving inch-mavens direction, namely from right to left in Fig. 2, material deposited by the chutes 17 into in adirection parallel with the axis of drum w Upon the movement the hopper 9 will be by said screw moved tothe discharge spout.'13. and discharged.

A series of lifting plates 18, are mounted within the drum and extend from end to end thereof and are-mounted inwardly of the channels 15, in a direction radially of the drum. This brings the lifting plates contiguous to the helical channels. In the present illustrationthe Outer edges of the lifting plates 18 engage the inner edges of the blades 16 In the present illustration the lifting plates are shown disposed substantially radially of the axis of rotation of the drunn I 5 When the drum is being rotated the helieal-chan11els 15 tend to move a portion of gnaterial toward the receiving and discharging end-4 of the drum, and the liftinnplates 18 tend to move another portion of the material, a portion which is disposed inwardly of that lying in the channels 15, in an 'orbital path, transversely of the direction of movement of the material acted upon by the channels, channels of course tend tomove material rotation.

Each of the lifting plates 18, is provided with a series of channels 19, upon that side which is the upper side of the plate when it is ascending in the working of the machine. The channels 19 are formed in the present illustration by a series of blades 20. Such channels are disposed in a direction substantially opposite to the direction of the channels 15, that is,' -the channels are at their working zone opposite disposition of channels is for the purpose of intimately and rapidly mixing "-the mass of material under treatment.

,component parts' of the material under treatment are intimately and quickly mixed by setting up within such mass a number of currentsmoving in miscellaneous paths, one crossing another and in causing the matcrialtending to move along the respective paths to be repeatedly diverted into other paths of movement.

In order to arrive at an understanding of the interrelation of the various paths or 'currents of movement and their interconnectiorl in efi'ectingi a complete admixture of the components of the mass of material under treatment the folowing analysis may be of assistance: The helical channels 15 act uptn the outer or the material and tend to move a body of such material, or rather a series of bodies which 7 15 directed toward: 1 "the receiving and discharging end 1 of the which might be called the front end,

By use of this present improvement the drumward portion of iaaepss of such material, toward the front end of the drum. This movement will be in a path substantially parallel with the axis of drum rotation. Each of the lifting plates will in turn .act upon the portion of the material disposed inwardly of that acted upon by thc'helical channels, and tend to carr a body of such 'material in an orbital path the normal dvanco 0f the first bodies of material in such channels resting upon the drum and cause the isame to be dumped on top-of the second-bodies of material deposited on the drum' in'.,' the helical channels, and such ;first bodies "of material-tolassume a positioi mwardly ofthe drumli and in the path, of movement of the lifting plates. of the first bodies of material out ofthe helical channels and away from the drum the material on the lifting plate which is then active will be permitted to discharge toward the drum, as Well as. inwardly and thus spread a third'body of material upon the second position of the first bodies. The channels 19 on the lifting plates being disposed in a direction opposite to-the direction of the-helical channels will cause the material which is spilled inwardly to move bodies of material. Apart of this v outwardly, that is,

toward the back end of the drum and that it to commingle with the body of material from another channel 15.

The foregoing is an analysis of the tendency of each portion of the apparatus sepa rately considered to transfer a moving body of material into a divergent path of movement. In the real action of the apparatus as a whole, however, each of the tendencies of action of each of the parts is modified by the tendency of action of each of the other parts, and a complete admixture of the component parts of the mass of material under treatment is quickly effected by the counter currents set up throughout the entire mass.

\Vhile material is being mixed the feed screw 11 will be revolving: in such a, direction that the material fed into the hopper 9, by the chutes 17 will be thrown back posed upon drum,

toward the centralportion of the drum. After the;mi'Xture hast-been completed the drum will be permitted to continueto rotate as before and the ,feedscrew 11 will be rotated in a reverse irection so that the material fed into-the hopper 9 from the ui-lllllGS 17 will be passed to the discharge spout 13.

Although but one form of embodiment of my invention is illustrated herein it will be perfectly obvious that changes in-detail of construction may be made Without departing from the spirit of my invention.

IT aving thus described my invention What I desire to secure by LettersPatcnt is:

1. The combination with a rotatable drum, of a series of helically disposed blades dischutes disposed upon the front head of the drum and associated with the respective helical blades, said chutes being directed inwardly, a centrally disposed hopper mounted within the drum and located in position for receiving material discharged by said chutes upon the rotation of the drum, and means located Within said hopper for moving material therein back- Wardly into the drum for further treatment or outwardly for discharging the same.

2. In a device of the character described, a revolving, horizontal drum, means for moving the material-continuously in a cir cuit therein and tumbling same, comprising peripherally disposed helical guides extending from end to end of said drum, longitudinal, radially-arranged lifting plates lying within said guides, guiding plates disposed obliquely on the lifting surface of said lifting plates, a discharge spout, and pockets at the ends of said. helical guides for feeding the material to said spout, substantially as described.

The combination with a revolving horiontal drum, having means for moving the material continuously in a circuit therein and tumbling same, of feeding apd discharge means communicating with the interior of said drum, said means comprising a shaft and a worm mounted on said shaft, said shaft being rotatable in one direction to operate said worm to eifect the discharge of the material from said drum, and in the reverse direction to produce the return of the material to said drum for further mixing. p I p 4. Ina device of the character described,

a revolving horizontal drum, having a recelving end,- means for moving the material continuously in ,a circuit therein and tumbling same, the path of movement of the material being toward the receiving end of said drum, and means located in the receiving end of the drum and independent of the movement thereof for and discharge of the material, said means embodying a Worm and a discharge outlet, the Worm being adapted to operate in one direction to effect the discharge of the material from said outlet and in the opposite direction to return the material to the drum for mixing.

5. In a device of the character described, the combination with a revolving horizontal drum, having one end provided for the reception of material, of means for moving the material continuously in a circuit therein and tumbling same, means for directing the path of movement of the material toward the reception end of said drum, and means located within said reception end and independent of the movement of said drum for feeding and discharging the material being operated upon, said means embodying a worm rotatable in one direction to effect the discharge of the material and in the reverse direction to return the material to said drum for further mixing, and a discharge chute located in said discharge and feeding means exteriorly of the reception end of said drum.

' 6. In combination with a revolving horizontal drum, having one end formed for the reception of material, means for moving the material continuously in a circuit therein and tumbling same, means for directing the path of movement of material toward the reception end and means located in the reception end of said drum, and independent of the movement of said drum, and embodying mechanism operable in one direction to discharge the-material from said drum and in a reverse direction to feed the material back into said drum for inter-mixing with the bulk of material therein.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

'- RICHARD TIEDTKE.

Witnesses:

J EAN GRUND, CARL GRUND.

effecting the feeding 

